Channel tank top construction for ships



Aug. 22, 1950 w. G. BARTENFELD CHANNEL TANK TOP CONSTRUCTION FOR SHIPSFiled May 6, 1948 d Z 6 f n e Z M r w Awmm atented Aug. 22, 1950 UNITEDSTATES PATENT CHANNEL TANK TOP CONSTRUCTION EOE SHIPS Wilford G.Bartenfeld, Lakewood, Ohio Application May 6, 1948, Serial-No. 25,477

3 Claims. 1

This invention relates to channel tank top con.- struction for ships,and more especially to a construction for a tank top by a transversearrangement of channels supported by longitudinals.

The main object or" the invention is to provide a channel tank topconstruction in which the channels extend transversely and consequentlythej oints between the channels lie in the same direction as the usualtransverse scraping, movement of the clam-shell bucket upon the tank topin the-unloading ofthe ship.

Another object of the invention is to provide such a transverse channeltank top to save damage thereto by the ,clam-shellibucket, or in eventthe channels become distorted or out of surface alinement relative toone another by damage of said bucket, the bucket would not be bumpingacross possible upstanding side edges of the channel'sbut move smoothlyin the same direction therewith.

Another object of the invention isto provide suchea1transverse channeltank top and supporting structure therefor at reduced weight, lowercost. resulting therefrom, and further reduced cost. in theprefabricating .of same and also in the assemblingthereof.

With the. above and other objects in view, the invention will behereinafter described with reference to the accompanying drawings, andthe novel features thereof will be particularly pointed out in theappended claims.

Inthe drawings, Figure l is a diagrammatical view of the cross sectionof the hull of a ship provided with a tank top according to my inventionandlookingtowards the flange of a channel,

Fig.2 is a cross sectionalview of a part ofthe hull and my constructionof tank top taken through the web of a channel,

Fig. 3 is a fragmental sectional view, on an enlarged scale, taken online 3-3 of Fig. 2,

Fig. 4 is a similar view taken on line i-4 of Fig. 2, and

Fig. 5 is a cross sectional view of a pair of adjacent flanges of thetank top channels showing the welding of same.

Referring to the drawings, l represents the hull of a ship used forcarrying coal or ore and comprising a bottom 2, sides 3 and 4, andlongitudinal channel girders as at 5. The sides of the side tanks areindicated by 6 and l and extend to the bottom 2.

For carrying out my invention, there is arranged longitudinally of theship and extending from the bottom 2 to the tank top, a center keelson 8and side keelsons 9 and Ill. The usual floor plates 1! extend from thecenter vkeelson to the side keelsons. The channels, designated by [2,forlforming the tank top are cut oil-the required length for extendingtransversely of the ship from the side 6 to the side 1 of the side tanksandareinverted and arranged flange to flange in any suitable number withtheir outer sides I3 05 their webs H!- in surface alinement for formingthe top of the tank as indicated by 15. For securing together thechannels 12 side by side ingroups and, also for making the longitudinaljoints 16 between the flanges ll thereof watertight and also water-tightat their ends l8, welding is employed at the upper web sides at l9 andat the lower toe ends at 20 and also at said ends of said channels.

.In assembling the groups of welded inverted channels [2 in position inthe ship, said groups are placed upon the top edges of thecenterkeelson8 and the side keelsons 9 and Ii), and with the adjacent pairs ofwelded flanges ll of the channels serving as a guide, said top edges ofsaid keelsons are notched out beneath said pairs of'fianges by burningfor receiving same and permitting the webs M of the channels to restupon said top edges of said keelsons and the top edges of the floorplates ll. Air release openings 2| areprovided at'the inner corners ofthe channels 12 by cutting oli the complemental corners of the sidekeelsons at 22. After the groups of channels l2 are dropped into placeinthe notched outkeelsons, the longitudinal joints of the adjacentgroups are welded as already described, and all joints between thechannels l2 and the center keelson 3 and the side keelsons 9 and Iii arewelded at 23 and 2 2, and'between the channels i2 and the floor plates ll at 25.

For supporting the channels l2 between the keelsons, longitudinalstringers 26 consisting of a vertical plate 2i and having a lateralflange 23 at its lower edge are employed. The upper portions of theplates 2? of the stringers 26 are notched out similar to that of thecenter keelson for receiving the pairs of flanges ll of the channels I2,and are welded thereto at 29 and 3B in the same manner, and the lateralflanges 28 of the stringers enter notches iii of the floor plates H andrest upon the bottom edges 32 thereof.

The transverse channels l2 are supported at their ends by angles 33 and3d fixed to the sides 6 and l, and the keelsons and the floor plates maybe supported and the latter connected to the former according tostandard practice.

The construction for transverse channel tank 3' top herein describedprovides a tank top capable of withstanding much clam-shell abuse inunloading, and provides for widely spaced and therefore fewer keelsonslongitudinal stringers supporting the tank top channels from the floorplates, all of which makes for a prefabricated construction of lessweight and reduced cost of material, also welding and erection at lowercost.

Having fully described my invention, what I claim is:

1. In a channel tank top construction for ships, the combination ofkeelsons, floor plates, channels having a web and flanges, the channelsbeing inverted and arranged with their flanges side by side in pairs,the joints between said pairs of flanges being welded, the keelsonsbeing notched for and receiving said pairs of flanges and permitting thewebs of said channels to rest upon said keelsons, the joints betweensaid keelsons and said channels being welded, the webs of said channelsresting upon said floor plates, the joints between the webs of saidchannels and said floor plates being welded, stringers extending betweensaid keelsons, the stringers consisting of vertical plates havinglateral flanges at their lower edges, the vertical plates of thestringers being notched for and receiving said pairs of flanges of saidchannels, the vertical plates of the stringers being welded to saidchannels, and said floor plates being notched for receiving andretaining said lateral flanges of said stringers against lateralmovement for supporting said stringers.

2. In a channel tank top construction for ships, the combination ofkeelsons, floor plates, channels having a Web and flanges, the channelsbeing inverted and arranged with their flanges side by side in pairs,the joints between said pairs or flanges being welded, the keelsonsbeing notched for and receiving said pairs of flanges and permitting thewebs of said channels to rest upon said keelsons, the joints betweensaid keelsons and said channels being welded, the webs of said channelsresting upon said floor plates, the joints between the Webs of saidchannels and said floor plates being welded, stringers extendinglongitudinally between said center keelson and said side keelsons, saidstringers consisting of a vertical plate and a right angle flange at itslower edge, the vertical plates of the stringers being notched forreceiving said pairs of flanges of said channels and being weldedthereto, said floor plates being provided with vertical rectangularopenings extending from their upper edges for receiving and providingseats for and preventing lateral movement of said flanges of saidstringers,

and said vertical plates and said flanges of said stringers being weldedto said floor plates.

3. In a channel tank top construction for ships, the combination ofkeelsons, floor plates, channels having a web and flanges, the channelsbeing inverted and arranged with their flanges side by side in pairs,the joints between said pairs of flanges being welded, the keelsonsbeing notched for and receiving said pairs of flanges and permitting thewebs of said channels to rest upon said keelsons, the joints betweensaid keelsons and said channels being welded, the webs of said channelsresting upon said floor plates, the joints between the webs of saidchannels and said floor plates being welded, stringers extendinglongitudinally between said center keelson and said side keelson, saidstringers consisting of a vertical plate and a right angle flange at itslower edge, the vertical plates of the stringers being notched for andreceiving said pairs of flanges of said channels and permitting the websof said channels to rest upon said plates of said stringers, thevertical plates of the stringers being welded to said channels, saidfloor plates between said center keelson and said side keelsons beingprovided with vertical openings extending downwardly from their topedges and having parallel sides and a right angle bottom, stringersconsisting of a vertical plate and a right angle flange along its loweredge, and the stringers being arranged in said openings of the floorplates and having their flanges resting upon said bottoms thereof andretained by said sides thereof for supporting said stringers and holdingsame in alinement.

WILFORD G. BARTENFELD.

REFERENCES CITED The following references are of record in the flle ofthis patent:

UNITED STATES PATENTS Great Britain Nov. 10, 1927

